Eld/4wd

Hello everyone !! I have a 2013 Raptor crew cab headers exhaust and tuner I’ll post pics a bit later. My question is my 4 wheel drive doesn’t engage from switch neither does my ELD. If I disconnect the vacuum line 4 wheel drive works great when connected I got nothing my vacuum pump is working and I don’t get any grinding it just does nothing when connected light comes on in dash but no 4 wheel drive. As for ELD I am going to crawl under the truck tonight and see if I have voltage to the locker. Was winding if any of you have ran into this problem before ?

Did you inspect the small plastic line near the top of the passenger wheel well?
That vacuum line gets toasty and cracks. I touched mine and it broke apart...
I got some weed whacker fule line and slide it over and zip tied it a year ago and no issues
May or may not be worth a look. .75 cents to fix an otherwise expensive issue

Now that I think of your issue with the disconnect... nevermind
two different issues

Hope you got it straight